Building from source.

For operating systems where no binary is provided or if
you want the latest development version, you will have to build it from
source. The code should be compilable on any system with
ISO C++. It's tested on Linux, Mac OS/X, and Windows cross compilers.
Less frequently, someone will build on MSVC, FreeBSD, OpenBSD, Solaris,
etc. Both Clang/LLVM and GNU C++ are regularly exercised.